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Sr Fullstack Developer Jobs in California (NOW HIRING)

Zendesk

Senior Fullstack Engineer, Solve

San Francisco, CA · On-site

$144K - $190K/yr

We're seeking a Senior Fullstack Engineer to help build Solve - an AI-powered conversation engine that resolves customer issues across channels. You'll deliver end-to-end features spanning LLM ...

Mochi Health

Senior Fullstack Engineer

San Francisco, CA · On-site

$330K/yr

If you want to do the most impactful work of your career, this is where to do it. Senior Fullstack Engineer Location: San Francisco, CA (5 days/week onsite) Salary Band: $230,000 - $280,000 (Open to ...

Mochi Health

Senior Fullstack Engineer

San Francisco, CA · On-site

$330K/yr

If you want to do the most impactful work of your career, this is where to do it. Senior Fullstack Engineer Location: San Francisco, CA (5 days/week onsite) Salary Band: $230,000 - $280,000 (Open to ...

Staffingine LLC

Full Stack Developer

Santa Monica, CA · On-site

Job Title: Sr. Fullstack Developer Job Location: Santa Monica, CA Job Type: Contract * Serve as senior full stack engineer developing responsive web/mobile applications in REACT and Native REACT ...

FlightStory

Senior Fullstack Engineer

Los Angeles, CA · On-site

$170K/yr

SENIOR ENGINEER - FULLSTACK COMPANY : STEVEN.COM REPORTING TO : VP of ENGINEERING LOCATION: LOS ANGELES SALARY: UP TO $170K ABOUT STEVEN.COM Steven.com is building the operating system for the ...

Cardata

Senior Fullstack Engineer

San Francisco, CA · On-site

$120 - $160/hr

Role Details Role overview: We're looking for an experienced fullstack engineer who can lead the ... Help us build and maintain a strong (and enjoyable!) developer experience. * Ensure that the ...

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Sr Fullstack Developer information

What is a Sr Fullstack Developer?

A Sr Fullstack Developer is an experienced software engineer who is proficient in both frontend and backend development. They work with a variety of programming languages, frameworks, and databases to build fully functional web applications. In addition to coding, senior fullstack developers often lead projects, mentor junior developers, and help make architectural decisions. Their broad skill set allows them to handle tasks across the entire technology stack, ensuring that applications are efficient, scalable, and user-friendly.

What are some typical challenges a Sr Fullstack Developer faces when balancing front-end and back-end responsibilities?

Sr Fullstack Developers often need to juggle tasks across both the front-end and back-end, which can be challenging when priorities shift quickly or deadlines are tight. Balancing deep technical knowledge in multiple frameworks and languages while ensuring seamless integration requires strong organizational skills and effective communication with both UI/UX designers and backend engineers. Additionally, staying updated with evolving technologies on both ends is crucial, so time management and continuous learning are key to success in this role.

What are the key skills and qualifications needed to thrive as a Sr Fullstack Developer, and why are they important?

To thrive as a Sr Fullstack Developer, you need advanced proficiency in both front-end and back-end programming languages, frameworks, and a solid understanding of software architecture, typically supported by a computer science degree or equivalent experience. Familiarity with tools such as Git, Docker, CI/CD pipelines, cloud platforms, and relevant certifications like AWS Certified Developer or similar are often expected. Strong problem-solving abilities, effective communication, and a collaborative mindset are vital soft skills for this role. These competencies enable developers to deliver robust, scalable solutions and effectively drive projects to completion in dynamic team environments.

What is the difference between Sr Fullstack Developer vs Backend Developer?

AspectSr Fullstack DeveloperBackend Developer
Required SkillsProficiency in both frontend (JavaScript, HTML, CSS) and backend (Node.js, Python, Java)Specialized in server-side languages and database management
Work EnvironmentWorks on both client-facing and server-side componentsFocuses primarily on backend systems and APIs
Common UsageUsed across full product development teamsPrimarily in backend-focused roles within development teams

The main difference between a Sr Fullstack Developer and a Backend Developer is the scope of expertise. A Sr Fullstack Developer handles both frontend and backend tasks, while a Backend Developer specializes in server-side development. Both roles require strong programming skills, but the Fullstack role demands broader knowledge across the entire application stack.

What are popular job titles related to Sr Fullstack Developer jobs in California?

For Sr Fullstack Developer jobs in California, the most frequently searched job titles are:

What job categories do people searching Sr Fullstack Developer jobs in California look for?

The top searched job categories for Sr Fullstack Developer jobs in California are:

What cities in California are hiring for Sr Fullstack Developer jobs?

Cities in California with the most Sr Fullstack Developer job openings:

Sr Fullstack Developer jobs near you
Infographic showing various Sr Fullstack Developer job openings in California as of August 2026, with employment types broken down into 1% As Needed, 86% Full Time, 7% Part Time, and 6% Contract. Highlights an 82% Physical, 8% Hybrid, and 10% Remote job distribution.

Senior Fullstack Engineer, RCM AI Product

Athelas

Mountain View, CA • On-site

$145K - $192K/yr

Full-time

Re-posted yesterday

Job description

Job Summary:
Athelas is a company focused on transforming healthcare through AI solutions. They are seeking a Senior Fullstack Engineer to build an agent orchestration layer for their Revenue Cycle Management AI Product, aimed at automating billing workflows and enhancing the efficiency of healthcare revenue cycles.
Responsibilities:
• Contribute to the most advanced billing platform in the country
• Build end-to-end products to revolutionize revenue cycle management for providers and administrators
• Be a part of a tremendously fast-paced team that celebrates fast execution and decisions
• Work across the entire software stack
• Work with a stack that includes Python, Javascript, Vue, React Native, Flask, and other frameworks
• Work directly with customers to solve their issues daily
Qualifications:
Required:
• Bachelor’s or Master’s degree in Computer Science, Engineering, or a related field, or equivalent extensive experience
• Professional software development industry experience
Preferred:
• Strong Backend/Full-Stack Programming Skills (Must be comfortable with Python)
• Very Familiar with Frontend JS technologies (React, Vue, etc.)
• Experience in environments where you have to ship quickly. We move fast.
• General Understanding of Containers and Cloud (Docker, Kubernetes)
• Excitement to work in a high impact field with a builder attitude!
• Experience building production environments
• Attention to detail around user experience and customer needs
• Extremely motivated to grow
• Strong leadership skills
Company:
Athelas develops technology to monitor chronically ill patients in their homes. It is a sub-organization of Commure. Founded in 2016, the company is headquartered in Mountain View, USA, with a team of 201-500 employees. The company is currently Growth Stage.

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